Honeycomb filters with reduced number of unplugged partial peripheral cells and methods of manufacturing same

a honeycomb filter and partial peripheral cell technology, applied in the field of honeycomb filter articles, can solve the problems of low emissions, and achieve the effect of reducing handing losses and being more resistant to edge chipping
US20070137158A1Active Publication Date: 2007-06-21CORNING INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
CORNING INC
Publication Date
2007-06-21

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Abstract

A method of blocking partial cells at the periphery of diesel filters is disclosed. The method comprises plugging the partial cells with a suitable plugging material. In one embodiment, a line of plugging material is applied to either or both of the end faces of the diesel filter along an outermost row of partial cells to block same. In another embodiment, the outermost wall the diesel filter is first beveled to form a beveled edge and uniquely off-set the partial cells. Then the beveled edge has applied thereto a plugging material, such as a line or bead. A honeycomb structure having reduced number of unplugged partial cells at the periphery is also disclosed.
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Description

TECHNICAL FIELD

[0001] The present invention relates to honeycomb filter articles and methods of manufacturing the same. More particularly, the present invention relates to methods of plugging cells of honeycomb filters and honeycomb filters manufactured thereby. BACKGROUND OF THE INVENTION

[0002] Diesel engines provide lower emissions and increased fuel economy compared to gasoline engines; however, if untreated diesel exhaust emissions are generally undesirable. Diesel particulate filters have been employed to control / treat particulate emissions from diesel-powered equipment such as trucks, buses, diesel electric locomotives and generators. Diesel particulate filters control diesel particulate emissions by physically trapping soot particles in their structure.

[0003] A typical diesel particulate filter body may be fabricated using, for example, a honeycomb structure having a matrix of intersecting thin, porous walls that extend across and between its two opposing open end faces an...

Claims

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